Cardinal Invariants for the $G_\delta $ topology

DOI10.4064/cm7349-6-2018zbMath1420.54007arXiv1707.04871OpenAlexW2963023897MaRDI QIDQ5742275

Santi Spadaro, Angelo Bella

Publication date: 13 May 2019

Published in: Colloquium Mathematicum (Search for Journal in Brave)

Full work available at URL: https://arxiv.org/abs/1707.04871

zbMATH Keywords

homogeneous spacecardinal invariantLindelöf degreeweak Lindelöf number\(G_\delta\) topology

Mathematics Subject Classification ID

Noncompact covering properties (paracompact, Lindelöf, etc.) (54D20) Cardinality properties (cardinal functions and inequalities, discrete subsets) (54A25) Counterexamples in general topology (54G20)

Related Items (10)

On the free set number of topological spaces and their \(G_\delta \)-modifications ⋮ Free sequences and the tightness of pseudoradial spaces ⋮ On a problem of Angelo Bella ⋮ On generalization of theorems of Pestryakov ⋮ The effect of forcing axioms on the tightness of the $G_\delta $-modification ⋮ Upper bounds for the tightness of the \(G_\delta\)-topology ⋮ Cardinality bounds via covers by compact sets ⋮ A Common Extension of Arhangel’skĭ’s Theorem and the Hajnal–Juhász Inequality ⋮ A survey of cardinality bounds on homogeneous topological spaces ⋮ A note on the tightness of \(G _{\delta}\)-modifications

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